Closing cap for bottles, etc.



Nov. 17, 1936. P. HEYMANS CLOSING CAP FOR BOTTLES,

ETC

Filed April 9, 1935 mvan-ron: Paul. HEYMHNS Patented Nov. 17, 1936 UNITED STATES PAr oFFicE.

Paul Heymans, Brussels, Belgium, assignor to Sobemi I (abreviation de; ,Socit BelgcJdEm-v ballages Metalliques Industriels) Socit. Annnyme, Brussels, Belgium,a company Application April 9, 1935, Serial No. 15,370"

' In Belgium October 13, 1934 Claims. (01.215939) My invention relates to improvements in the closure caps which are used for the stopping for instance of bottles or other vessels.

It'has for its object to obtain closure caps capable of being used several times successively, in which the ingress of air to the inside of the vessel or the escape of gas or liquid from the latter is rendered impossible, and in which when removing the cap with a suitable tool, the stress produced by the latter to expand the portion set or pressed in and enable it to pass over the collar of the neck, should not be liable to cause the neck to break.

With this object in view, my invention essentially consists in the special arrangements and combination of parts hereinafter fully described and pointed out in the appended claims.

On the annexed drawing which shows, by way of example, a form of embodiment of a cap according to the invention:

Figure 1 is an elevational view, partly in cross section, of a closure cap according to the invention.

Figure 2 is a similar view to Figure 1 after the cap has been applied on the neck.

Figure 3 is a transverse sectional view of a portion of the closure cap engaged upon the neck of a bottle to show the manner of engagement of the cap flange about the mouth of a bottle neck.

As shown on the drawing, the cap comprises a top I and a depending flange or skirt 2 which is formed for instance of flat faces 3 arranging the flange of polygonal outline form with the faces separated by stiffening lines or bends 4 at the angle of said faces which extend from the top I to adjacent and within the edge of the cap flange, and the cap flange at the end of said faces annularly constricted to curve the cap flange slightly inwardly, as at 5, effected by circumferentially pressing the material of the cap flange inwardly.

The flange 2 outward from the portion 5 is arranged as an outwardly flared bell-mouthed extension 6.

It is to be observed that this cap is particularly adapted to be used with the ordinary bottle having a rounded lip and requires no special formation of the neck and lip of the bottle. Furthermore the polygonal flange is curved inwardly to a slight extent to engage the bottle lipon the underside of its curve and in spaced relation to the bottle neck so that such engagement acts to force the cap down on the bottle. The polygonal form of the flange is highly important. It is a well recognized mathematical 'fact that a'circle of a given'diameter includes the largest area which can be bounded by allude-"equal to the circumference of such 'a circle. Consequently, a polygonal flange of a 5 certain periphery can be sprung to a more nearly circular form with the effect of enlarging its internal capacity and a cap thus provided can be slipped on and off a bottle a number of times without stretching the material, the flange at once resuming its normal shape and capacity (internal area).

A closure cap of this kind can be obtained by a single stamping operation.

When placed on the neck 1 of a bottle having, for instance, as usual, a rounded bead or lip 8 about the mouth of the neck of the bottle, the faces 3 come into contact with said lip.

The setting in or pressing in operation takes place along the lower portion of the flange 2, and the constricted portion 5 is thereby engaged under the lip 8 with the bell-mouthed extension 6 intact and out of contact with the bottle neck.

When removing the cap by means of a suitable tool, the latter comes into contact with the lower edge of the bell-mouthed part 6 and exerts a lifting action which has as a result to widen the set or pressed-in portion 5 which presents a certain elasticity. This set or pressed-in portion 5 passes over the neck but immediately returns to its former diameter owing to the elasticity of the metal and to the stiffening lines or bends which do not easily come to a deformation.

When placing the cap again on the neck, the portion which must be set in widens under the pressure applied by hand on the top of the cap and passes over the lip 8 of the neck 7. It afterwards returns to its former diameter owing to the tension stress produced in the flat faces and through the action of the stiffening lines or bends which, after having been widened, now close down again after the manner of claws.

What I claim is:

1. A closure cap for bottles and the like having a rounded lip about the mouth of the bottle neck, said cap comprising a top and a flange depending therefrom and having a plurality of small flat faces imparting to the flange a polygonal outline, said flange being curved slightly inwardly at the end of said faces along a line parallel with but spaced from the free edge of the flange for engagement with the rounded under face of the bottle lip and urge the cap tightly onto the bottle mouth, the edge portion of the flange extending outward from said inwardly curved portion.

2. A closure cap for bottles and the like, comprising a top and an integral depending flange of polygonal shape in cross section, said cap flange being annularly constricted along a line parallel with its free edge and flared outwardly from said constricted portion.

3. A closure cap for bottles and the like having a rounded lip about the mouthof the bottle neck, said cap comprising a top and an integral depending flange of polygonal shape in cross section, said flange being annularly constricted along a line parallel with its free edge and adapted to engage the rounded under face of the bottle lip and urge the cap tightly onto the mouth of the bottle neck, the edge portion of the cap flange outward from the constricted portion being flared laterally to bell-mouth form and adapted to remain intact and out of contact with the neck of the bottle when the cap is engaged thereon.

4. A closure cap for receptacles having an ex-' ternal bead about the mouth, said cap comprising a top and an integral flange of polygonal shape in cross section formed of small flat faces seoarated by stiffening lines at the juncture of the flat faces extending transversely of the cap flange from the top of the cap to a line parallel with but spaced from the free edge of the flange, said flange being curved slightly inward at said line and then flared outwardly to bell-mouth form, and said inwardly curved portion being adapted to engage under the rounded bead about the mouth of the receptacle and urge the cap towards said mouth, the bell-mouth portion remaining intact and out of contact with the neck of the receptacle.

5. A closure cap for receptacles, comprising a top and a depending flange, said flange being circum-ferentially constricted along a line parallel with but spaced from the free edge of the flange and flared laterallyto bell-mouth form outward from said constricted portion, and the portion of the flange between the cap and the constricted portion being of polygonal outline in cross section formed of flat faces with the angles formed by said faces extending transversely of the flange from the top thereof to the constricted portion.

PAUL HEYMAN S. 

